206057317 has 2 divisors, whose sum is σ = 206057318. Its totient is φ = 206057316.

The previous prime is 206057309. The next prime is 206057347. The reversal of 206057317 is 713750602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172948801 + 33108516 = 13151^2 + 5754^2 .

It is a cyclic number.

It is not a de Polignac number, because 206057317 - 2³ = 206057309 is a prime.

It is equal to p_11395624 and since 206057317 and 11395624 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206057347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103028658 + 103028659.

It is an arithmetic number, because the mean of its divisors is an integer number (103028659).

Almost surely, 2^206057317 is an apocalyptic number.

It is an amenable number.

206057317 is a deficient number, since it is larger than the sum of its proper divisors (1).

206057317 is an equidigital number, since it uses as much as digits as its factorization.

206057317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 206057317 is about 14354.6966878440. The cubic root of 206057317 is about 590.6488284928.

The spelling of 206057317 in words is "two hundred six million, fifty-seven thousand, three hundred seventeen".